Floor drain



FIG. 1 is a first perspective view of a floor drain showing my design;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dashed broken lines in the drawings depict portions of the floor drain that form no part of the claimed design. The dash-dot broken lines define the boundaries of the claim that form no part of the claim. 

CLAIM The ornamental design for a floor drain, as shown and described. 